Shutter for cinematographic apparatus.



A. & L. CHRONIK.

SHUTTER FOR CINEMATOGRAPHIC APPARATUS.

APPLICATION FILED JUNE 1. 1916.

1,223, 147. Patented Apr. 17, 1917.

WITNESS UNITED STATES PATENT oFFioE.

TTEE F 013, GINEMATGGEAEHIC AP?ABATUS,

Oi E1 is a ll rough;

notch or open elapteo. to pass c e exposure aperture the iihn hand. associated a shutter in w l c s of this invention is ill; lo. This inechar oje-t Ls pie and eiiicient .niechanisni if that is fixedly ittaehed to a Sli tte opening is ads the latter being rotah bl mounted in a bear fi -e s e the camera is ruining, 111g 18 and in the p: on ie dislin otiei es While the film feeding it? is provided with. referablv mgghsnigm i i peraigign, shaped opening 19, ihroi h which, in th Another object of the invention is to prorotation of the said disk li ht is permitted duce a shutter of the type mentioned that to pass from the lens (not shown) hrough 80 serves at the same time as a dissolving atthe exposure aperture. A somewhat heavy a lnnent r cameras, that is to say, as a rim 20 connects the peripheral points of the IQMIS whereby the pictures on the lilin are edges of the opening 19 so as to balance used to gradually fade aim and other the shutter. in parallel relation to the disl; )ictures are nude to appear gradually in i6 ther are oscillatahly mounted upon the 85 place fi 5 shutter shaft tivo h aves 2i and 22 which With these and other objects in View, are adapted to he moved in parallel relavvhich will more fully appear as the nature tion to the shutter to vary the size of the of the invention is better understood, the shutter opening or to close the same altosanie consists in the coinbinatioin ar 'angegether. For aci'ueting the leaves there is 90 ment, and construction of parts hereinafter mounted upon the front face of the shutter described, pointed out in the appended disk 16 a slide held in "face by a guide claims and illustrated in the accompanying "23, that permits the said slide to move in drawings it being understood that many a radial direction. To this slide is fixedly changes may be made in the size and pro attached a lug 292, which extends through 95 portion of the several parts and details of a radial slot in the shutter disk and is construction within the scope of the ap pivoted to 'tWU link" 26 and 27, which are pended claims without departing from the fulcruined at '28 and 29 to the leaves 21 and spirit or sacrificing any of the advantages 2. respectively. of the invention. To t 1e slide is pivoted in front of tlu Two of the many possible embodiments shutter dish a linlll), \vlieh pivoted r oi the invention are illustrated in the acto a groove" l l, the latter coinpanying drawings in \lli(llllshifl'abli dis 1. the shutter shaft.

Figure 1 is a plan \lGW of a portion of e The collar i slide in the direccinenialographic camera showing the shut tion of the the h l 05 lei: constructed in accordance with this inbut is he 5 removed oroer to more clearly slnnv the shutter slla' c instruction: Fig. 2 a ele 'ation of the said vention mounted thereon the cover being; For-this;

V e said siutler: *ig. 3 a

f El rear elevation collar rear T 0- 11C- thereof: his. is a section taken line that is at; :5 fl 1 7 g :M .f oi L; Fig. is a rear elevation iaiier oeing w s camera casing, and provided with a handle 36 which is disposed outside of the said casing. For the purpose of holding the rocking shaft 35 in place against accidental movement, any suitable means may be made use of, for instance, there may be attached to or formed upon the said shaft a stop 37, against which and against the camera casing bears a spring 88, coiled upon the said rocking shaft.

Rotation may be imparted to the shutter shaft from a driving shaft, that is,connected with the film feeding mechanism. This shaft is indicated in the drawings by the numeral 39, and provided with a handle 40 outside of the camera casing. To the driving shaft 39 is keyed or otherwise attached a gear 41, in mesh with a pinion 4-2, which is rigidly secured to a counter-shaft 4:3. This counter-shaft carries a bevel-gear -i, meshring with a similar gear 45 upon the shutter shaft.

The operation of this device is as follows: Vlhen the parts are in the positions shown in Figs. 1 to a, inclusive, the shutter opening is unobstructed. If it is intended to decrease the size of the opening, the handle 36 of the rocking shaft is shifted so as to cause the grooved collar 31 to move upon the shutter shaft forward. By this operation the slide 23 is caused to move in a radial direction toward the center of the shutter disk, thereby shifting the leaves 21 and 22 around the shutter shaft toward closing positions. In this manner, obviously, any desired shutter opening may be obtained, ranging from a maximum to zero. Attention is called to the fact that the adjustment of the shutter opening may be effected during the operation of the camera, inasmuch as the shifting of the leaves of the shutter does not interfere with the operation of the film feeding mechanism. With the handle 86 there may be associated a graduated scale (not shown in the drawings) for the purpose of allowing the operator to predetermine the size of the shutter opening.

If it is intended to cause the pictures on the film band to be taken to fade away gradually, the handle at of the rocking shaft is moved slowly so as to shift the shutter leaves from their open to their closing positions. 0n the other hand if the pictures to be taken are to appear on the film band gradually, the shutter leaves are shifted slowly from their closing to their entirelv open position. ()bviously these operations may be also performed during the running of the camera.

A modification of the invention is illustrated in Figs. 5 to 7, inclusive. differing from the one above described in that, instead of the links 26 and 27, there are rigidly secured to the lug 24; two l'iuhv h; and 4-7,

meager which mesh with pinions 48 and 49, that are secured to the shutter leaves 21 and 22, re spectively. If, in this case, the grooved collar 31 is shifted upon the shutter shaft, the said racks are caused to move down or up, according to the motion of the grooved collar, and accordingly the shutter leaves are shifted to their closing or opening positions. Otherwise the operation of the mechanism is the same as that of the device above disclosed.

What we claim is l. A shutter for cinematographic cameras comprising a rotary shaft, a disk fixedly attached thereto having an opening, two leaves oscillatably mounted upon said shaft for controlling said opening, a member shiftably disposed upon said shaft, and a connection between said member and said leaves for actuating the latter upon shifting said memher.

2. The combination with a camera easing, of a shutter shaft rotatably mounted therein, a disk fixedly attached to said shaft having an opening, two leaves oscillatably mounted upon said shaft for controlling said opening, a member shiftably disposed upon said shaft, a connection between said member and said leaves for actuating the latter upon shifting said member, and operating means extending through said casing and in engagement with said member for manually operating said member.

8. A shutter for cinematographic cameras, comprising a rotary shaft, a disk fixedly attached thereto having an opening, two leaves oscillatably mounted upon said shaft for cmitrolling said opening, a member shiftably disposed upon said shaft, a slide movable in a radial direction on said disk, a link connecting said slide with each leaf, and a link connecting said slide with said shift-able member, whereby said leaves are actuated upon shifting said member.

4. A shutter for cinematographic cameras, comprising a rotary shaft, a disk fixedly attached thereto having an opening, two leaves oscillatably mounted upon said shaft for controlling said opening, and means upon said shaft in engagement with said leaves for actuating the latter.

""' 5. A shutter for cinematographic cameras,

comprising a rotary shaft, a disk fixedly attached thereto having an opening, two leaves oscillatably mounted upon said shaft for controlling said opening, and means shiftab disposed upon said shaft in engagen'ient with said leaves for actuating the latter.

Signed at New York, in the county of New York and State of New York, this 31st day of May, A. D. 1916.

AUGUST GHRONIK.

LOUIS CHRONIK. 

